*x2P = im->cx2;
*y2P = im->cy2;
}
-
-
-/* Filters function added on 2003/12
- * by Pierre-Alain Joye (pajoye@pearfr.org)
- **/
-/* Begin filters function */
-#ifndef HAVE_GET_TRUE_COLOR
-#define GET_PIXEL_FUNCTION(src)(src->trueColor?gdImageGetTrueColorPixel:gdImageGetPixel)
-#endif
-
-/* invert src image */
-int gdImageNegate(gdImagePtr src)
-{
- int x, y;
- int r,g,b,a;
- int new_pxl, pxl;
- typedef int (*FuncPtr)(gdImagePtr, int, int);
- FuncPtr f;
-
- if (src==NULL) {
- return 0;
- }
-
- f = GET_PIXEL_FUNCTION(src);
-
- for (y=0; y<src->sy; ++y) {
- for (x=0; x<src->sx; ++x) {
- pxl = f (src, x, y);
- r = gdImageRed(src, pxl);
- g = gdImageGreen(src, pxl);
- b = gdImageBlue(src, pxl);
- a = gdImageAlpha(src, pxl);
-
- new_pxl = gdImageColorAllocateAlpha(src, 255-r, 255-g, 255-b, a);
- if (new_pxl == -1) {
- new_pxl = gdImageColorClosestAlpha(src, 255-r, 255-g, 255-b, a);
- }
- gdImageSetPixel (src, x, y, new_pxl);
- }
- }
- return 1;
-}
-
-/* Convert the image src to a grayscale image */
-int gdImageGrayScale(gdImagePtr src)
-{
- int x, y;
- int r,g,b,a;
- int new_pxl, pxl;
- typedef int (*FuncPtr)(gdImagePtr, int, int);
- FuncPtr f;
- f = GET_PIXEL_FUNCTION(src);
-
- if (src==NULL) {
- return 0;
- }
-
- for (y=0; y<src->sy; ++y) {
- for (x=0; x<src->sx; ++x) {
- pxl = f (src, x, y);
- r = gdImageRed(src, pxl);
- g = gdImageGreen(src, pxl);
- b = gdImageBlue(src, pxl);
- a = gdImageAlpha(src, pxl);
- r = g = b = (int) (.299 * r + .587 * g + .114 * b);
-
- new_pxl = gdImageColorAllocateAlpha(src, r, g, b, a);
- if (new_pxl == -1) {
- new_pxl = gdImageColorClosestAlpha(src, r, g, b, a);
- }
- gdImageSetPixel (src, x, y, new_pxl);
- }
- }
- return 1;
-}
-
-/* Set the brightness level <level> for the image src */
-int gdImageBrightness(gdImagePtr src, int brightness)
-{
- int x, y;
- int r,g,b,a;
- int new_pxl, pxl;
- typedef int (*FuncPtr)(gdImagePtr, int, int);
- FuncPtr f;
- f = GET_PIXEL_FUNCTION(src);
-
- if (src==NULL || (brightness < -255 || brightness>255)) {
- return 0;
- }
-
- if (brightness==0) {
- return 1;
- }
-
- for (y=0; y<src->sy; ++y) {
- for (x=0; x<src->sx; ++x) {
- pxl = f (src, x, y);
-
- r = gdImageRed(src, pxl);
- g = gdImageGreen(src, pxl);
- b = gdImageBlue(src, pxl);
- a = gdImageAlpha(src, pxl);
-
- r = r + brightness;
- g = g + brightness;
- b = b + brightness;
-
- r = (r > 255)? 255 : ((r < 0)? 0:r);
- g = (g > 255)? 255 : ((g < 0)? 0:g);
- b = (b > 255)? 255 : ((b < 0)? 0:b);
-
- new_pxl = gdImageColorAllocateAlpha(src, (int)r, (int)g, (int)b, a);
- if (new_pxl == -1) {
- new_pxl = gdImageColorClosestAlpha(src, (int)r, (int)g, (int)b, a);
- }
- gdImageSetPixel (src, x, y, new_pxl);
- }
- }
- return 1;
-}
-
-
-int gdImageContrast(gdImagePtr src, double contrast)
-{
- int x, y;
- int r,g,b,a;
- double rf,gf,bf;
- int new_pxl, pxl;
- typedef int (*FuncPtr)(gdImagePtr, int, int);
-
- FuncPtr f;
- f = GET_PIXEL_FUNCTION(src);
-
- if (src==NULL) {
- return 0;
- }
-
- contrast = (double)(100.0-contrast)/100.0;
- contrast = contrast*contrast;
-
- for (y=0; y<src->sy; ++y) {
- for (x=0; x<src->sx; ++x) {
- pxl = f(src, x, y);
-
- r = gdImageRed(src, pxl);
- g = gdImageGreen(src, pxl);
- b = gdImageBlue(src, pxl);
- a = gdImageAlpha(src, pxl);
-
- rf = (double)r/255.0;
- rf = rf-0.5;
- rf = rf*contrast;
- rf = rf+0.5;
- rf = rf*255.0;
-
- bf = (double)b/255.0;
- bf = bf-0.5;
- bf = bf*contrast;
- bf = bf+0.5;
- bf = bf*255.0;
-
- gf = (double)g/255.0;
- gf = gf-0.5;
- gf = gf*contrast;
- gf = gf+0.5;
- gf = gf*255.0;
-
- rf = (rf > 255.0)? 255.0 : ((rf < 0.0)? 0.0:rf);
- gf = (gf > 255.0)? 255.0 : ((gf < 0.0)? 0.0:gf);
- bf = (bf > 255.0)? 255.0 : ((bf < 0.0)? 0.0:bf);
-
- new_pxl = gdImageColorAllocateAlpha(src, (int)rf, (int)gf, (int)bf, a);
- if (new_pxl == -1) {
- new_pxl = gdImageColorClosestAlpha(src, (int)rf, (int)gf, (int)bf, a);
- }
- gdImageSetPixel (src, x, y, new_pxl);
- }
- }
- return 1;
-}
-
-
-int gdImageColor(gdImagePtr src, const int red, const int green, const int blue, const int alpha)
-{
- int x, y;
- int new_pxl, pxl;
- typedef int (*FuncPtr)(gdImagePtr, int, int);
- FuncPtr f;
-
- if (src == NULL) {
- return 0;
- }
-
- f = GET_PIXEL_FUNCTION(src);
-
- for (y=0; y<src->sy; ++y) {
- for (x=0; x<src->sx; ++x) {
- int r,g,b,a;
-
- pxl = f(src, x, y);
- r = gdImageRed(src, pxl);
- g = gdImageGreen(src, pxl);
- b = gdImageBlue(src, pxl);
- a = gdImageAlpha(src, pxl);
-
- r = r + red;
- g = g + green;
- b = b + blue;
- a = a + alpha;
-
- r = (r > 255)? 255 : ((r < 0)? 0:r);
- g = (g > 255)? 255 : ((g < 0)? 0:g);
- b = (b > 255)? 255 : ((b < 0)? 0:b);
- a = (a > 127)? 127 : ((a < 0)? 0 : a);
-
- new_pxl = gdImageColorAllocateAlpha(src, r, g, b, a);
- if (new_pxl == -1) {
- new_pxl = gdImageColorClosestAlpha(src, r, g, b, a);
- }
- gdImageSetPixel (src, x, y, new_pxl);
- }
- }
- return 1;
-}
-
-int gdImageConvolution(gdImagePtr src, float filter[3][3], float filter_div, float offset)
-{
- int x, y, i, j, new_a;
- float new_r, new_g, new_b;
- int new_pxl, pxl=0;
- gdImagePtr srcback;
- typedef int (*FuncPtr)(gdImagePtr, int, int);
- FuncPtr f;
-
- if (src==NULL) {
- return 0;
- }
-
- /* We need the orinal image with each safe neoghb. pixel */
- srcback = gdImageCreateTrueColor (src->sx, src->sy);
- if (srcback==NULL) {
- return 0;
- }
-
- gdImageSaveAlpha(srcback, 1);
- new_pxl = gdImageColorAllocateAlpha(srcback, 0, 0, 0, 127);
- gdImageFill(srcback, 0, 0, new_pxl);
-
- gdImageCopy(srcback, src,0,0,0,0,src->sx,src->sy);
-
- f = GET_PIXEL_FUNCTION(src);
-
- for ( y=0; y<src->sy; y++) {
- for(x=0; x<src->sx; x++) {
- new_r = new_g = new_b = 0;
- new_a = gdImageAlpha(srcback, pxl);
-
- for (j=0; j<3; j++) {
- int yv = MIN(MAX(y - 1 + j, 0), src->sy - 1);
- for (i=0; i<3; i++) {
- pxl = f(srcback, MIN(MAX(x - 1 + i, 0), src->sx - 1), yv);
- new_r += (float)gdImageRed(srcback, pxl) * filter[j][i];
- new_g += (float)gdImageGreen(srcback, pxl) * filter[j][i];
- new_b += (float)gdImageBlue(srcback, pxl) * filter[j][i];
- }
- }
-
- new_r = (new_r/filter_div)+offset;
- new_g = (new_g/filter_div)+offset;
- new_b = (new_b/filter_div)+offset;
-
- new_r = (new_r > 255.0f)? 255.0f : ((new_r < 0.0f)? 0.0f:new_r);
- new_g = (new_g > 255.0f)? 255.0f : ((new_g < 0.0f)? 0.0f:new_g);
- new_b = (new_b > 255.0f)? 255.0f : ((new_b < 0.0f)? 0.0f:new_b);
-
- new_pxl = gdImageColorAllocateAlpha(src, (int)new_r, (int)new_g, (int)new_b, new_a);
- if (new_pxl == -1) {
- new_pxl = gdImageColorClosestAlpha(src, (int)new_r, (int)new_g, (int)new_b, new_a);
- }
- gdImageSetPixel (src, x, y, new_pxl);
- }
- }
- gdImageDestroy(srcback);
- return 1;
-}
-
-int gdImageSelectiveBlur( gdImagePtr src)
-{
- int x, y, i, j;
- float new_r, new_g, new_b;
- int new_pxl, cpxl, pxl, new_a=0;
- float flt_r [3][3];
- float flt_g [3][3];
- float flt_b [3][3];
- float flt_r_sum, flt_g_sum, flt_b_sum;
-
- gdImagePtr srcback;
- typedef int (*FuncPtr)(gdImagePtr, int, int);
- FuncPtr f;
-
- if (src==NULL) {
- return 0;
- }
-
- /* We need the orinal image with each safe neoghb. pixel */
- srcback = gdImageCreateTrueColor (src->sx, src->sy);
- if (srcback==NULL) {
- return 0;
- }
- gdImageCopy(srcback, src,0,0,0,0,src->sx,src->sy);
-
- f = GET_PIXEL_FUNCTION(src);
-
- for(y = 0; y<src->sy; y++) {
- for (x=0; x<src->sx; x++) {
- flt_r_sum = flt_g_sum = flt_b_sum = 0.0;
- cpxl = f(src, x, y);
-
- for (j=0; j<3; j++) {
- for (i=0; i<3; i++) {
- if ((j == 1) && (i == 1)) {
- flt_r[1][1] = flt_g[1][1] = flt_b[1][1] = 0.5;
- } else {
- pxl = f(src, x-(3>>1)+i, y-(3>>1)+j);
- new_a = gdImageAlpha(srcback, pxl);
-
- new_r = ((float)gdImageRed(srcback, cpxl)) - ((float)gdImageRed (srcback, pxl));
-
- if (new_r < 0.0f) {
- new_r = -new_r;
- }
- if (new_r != 0) {
- flt_r[j][i] = 1.0f/new_r;
- } else {
- flt_r[j][i] = 1.0f;
- }
-
- new_g = ((float)gdImageGreen(srcback, cpxl)) - ((float)gdImageGreen(srcback, pxl));
-
- if (new_g < 0.0f) {
- new_g = -new_g;
- }
- if (new_g != 0) {
- flt_g[j][i] = 1.0f/new_g;
- } else {
- flt_g[j][i] = 1.0f;
- }
-
- new_b = ((float)gdImageBlue(srcback, cpxl)) - ((float)gdImageBlue(srcback, pxl));
-
- if (new_b < 0.0f) {
- new_b = -new_b;
- }
- if (new_b != 0) {
- flt_b[j][i] = 1.0f/new_b;
- } else {
- flt_b[j][i] = 1.0f;
- }
- }
-
- flt_r_sum += flt_r[j][i];
- flt_g_sum += flt_g[j][i];
- flt_b_sum += flt_b [j][i];
- }
- }
-
- for (j=0; j<3; j++) {
- for (i=0; i<3; i++) {
- if (flt_r_sum != 0.0) {
- flt_r[j][i] /= flt_r_sum;
- }
- if (flt_g_sum != 0.0) {
- flt_g[j][i] /= flt_g_sum;
- }
- if (flt_b_sum != 0.0) {
- flt_b [j][i] /= flt_b_sum;
- }
- }
- }
-
- new_r = new_g = new_b = 0.0;
-
- for (j=0; j<3; j++) {
- for (i=0; i<3; i++) {
- pxl = f(src, x-(3>>1)+i, y-(3>>1)+j);
- new_r += (float)gdImageRed(srcback, pxl) * flt_r[j][i];
- new_g += (float)gdImageGreen(srcback, pxl) * flt_g[j][i];
- new_b += (float)gdImageBlue(srcback, pxl) * flt_b[j][i];
- }
- }
-
- new_r = (new_r > 255.0f)? 255.0f : ((new_r < 0.0f)? 0.0f:new_r);
- new_g = (new_g > 255.0f)? 255.0f : ((new_g < 0.0f)? 0.0f:new_g);
- new_b = (new_b > 255.0f)? 255.0f : ((new_b < 0.0f)? 0.0f:new_b);
- new_pxl = gdImageColorAllocateAlpha(src, (int)new_r, (int)new_g, (int)new_b, new_a);
- if (new_pxl == -1) {
- new_pxl = gdImageColorClosestAlpha(src, (int)new_r, (int)new_g, (int)new_b, new_a);
- }
- gdImageSetPixel (src, x, y, new_pxl);
- }
- }
- gdImageDestroy(srcback);
- return 1;
-}
-
-int gdImageEdgeDetectQuick(gdImagePtr src)
-{
- float filter[3][3] = {{-1.0,0.0,-1.0},
- {0.0,4.0,0.0},
- {-1.0,0.0,-1.0}};
-
- return gdImageConvolution(src, filter, 1, 127);
-}
-
-int gdImageGaussianBlur(gdImagePtr im)
-{
- float filter[3][3] = {{1.0,2.0,1.0},
- {2.0,4.0,2.0},
- {1.0,2.0,1.0}};
-
- return gdImageConvolution(im, filter, 16, 0);
-}
-
-int gdImageEmboss(gdImagePtr im)
-{
-/*
- float filter[3][3] = {{1.0,1.0,1.0},
- {0.0,0.0,0.0},
- {-1.0,-1.0,-1.0}};
-*/
- float filter[3][3] = {{ 1.5, 0.0, 0.0},
- { 0.0, 0.0, 0.0},
- { 0.0, 0.0,-1.5}};
-
- return gdImageConvolution(im, filter, 1, 127);
-}
-
-int gdImageMeanRemoval(gdImagePtr im)
-{
- float filter[3][3] = {{-1.0,-1.0,-1.0},
- {-1.0,9.0,-1.0},
- {-1.0,-1.0,-1.0}};
-
- return gdImageConvolution(im, filter, 1, 0);
-}
-
-int gdImageSmooth(gdImagePtr im, float weight)
-{
- float filter[3][3] = {{1.0,1.0,1.0},
- {1.0,0.0,1.0},
- {1.0,1.0,1.0}};
-
- filter[1][1] = weight;
-
- return gdImageConvolution(im, filter, weight+8, 0);
-}
-/* End filters function */
projects / php / commitdiff